1 /* 2 Open Tracker License 3 4 Terms and Conditions 5 6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved. 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy of 9 this software and associated documentation files (the "Software"), to deal in 10 the Software without restriction, including without limitation the rights to 11 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 12 of the Software, and to permit persons to whom the Software is furnished to do 13 so, subject to the following conditions: 14 15 The above copyright notice and this permission notice applies to all licensees 16 and shall be included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 22 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION 23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 25 Except as contained in this notice, the name of Be Incorporated shall not be 26 used in advertising or otherwise to promote the sale, use or other dealings in 27 this Software without prior written authorization from Be Incorporated. 28 29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks 30 of Be Incorporated in the United States and other countries. Other brand product 31 names are registered trademarks or trademarks of their respective holders. 32 All rights reserved. 33 */ 34 35 // NodePreloader manages caching up icons from apps and prefs folder for 36 // fast display 37 // 38 39 #include <Debug.h> 40 #include <Directory.h> 41 #include <Entry.h> 42 #include <FindDirectory.h> 43 #include <Node.h> 44 #include <NodeMonitor.h> 45 #include <Path.h> 46 47 #include "AutoLock.h" 48 #include "IconCache.h" 49 #include "NodePreloader.h" 50 #include "Thread.h" 51 #include "Tracker.h" 52 53 54 NodePreloader * 55 NodePreloader::InstallNodePreloader(const char *name, BLooper *host) 56 { 57 NodePreloader *result = new NodePreloader(name); 58 { 59 AutoLock<BLooper> lock(host); 60 if (!lock) 61 return NULL; 62 host->AddHandler(result); 63 } 64 result->Run(); 65 return result; 66 } 67 68 69 NodePreloader::NodePreloader(const char *name) 70 : BHandler(name), 71 fModelList(20, true), 72 fQuitRequested(false) 73 { 74 } 75 76 77 NodePreloader::~NodePreloader() 78 { 79 // block deletion while we are locked 80 fQuitRequested = true; 81 fLock.Lock(); 82 } 83 84 85 void 86 NodePreloader::Run() 87 { 88 fLock.Lock(); 89 Thread::Launch(NewMemberFunctionObject(&NodePreloader::Preload, this)); 90 } 91 92 93 Model * 94 NodePreloader::FindModel(node_ref itemNode) const 95 { 96 for (int32 count = fModelList.CountItems() - 1; count >= 0; count--) { 97 Model *model = fModelList.ItemAt(count); 98 if (*model->NodeRef() == itemNode) 99 return model; 100 } 101 return NULL; 102 } 103 104 105 void 106 NodePreloader::MessageReceived(BMessage *message) 107 { 108 // respond to node monitor notifications 109 110 node_ref itemNode; 111 switch (message->what) { 112 case B_NODE_MONITOR: 113 switch (message->FindInt32("opcode")) { 114 case B_ENTRY_REMOVED: 115 { 116 AutoLock<Benaphore> locker(fLock); 117 message->FindInt32("device", &itemNode.device); 118 message->FindInt64("node", &itemNode.node); 119 Model *model = FindModel(itemNode); 120 if (!model) 121 break; 122 // PRINT(("preloader removing file %s\n", model->Name())); 123 IconCache::sIconCache->Removing(model); 124 fModelList.RemoveItem(model); 125 break; 126 } 127 128 case B_ATTR_CHANGED: 129 case B_STAT_CHANGED: 130 { 131 AutoLock<Benaphore> locker(fLock); 132 message->FindInt32("device", &itemNode.device); 133 message->FindInt64("node", &itemNode.node); 134 135 const char *attrName; 136 message->FindString("attr", &attrName); 137 Model *model = FindModel(itemNode); 138 if (!model) 139 break; 140 BModelOpener opener(model); 141 IconCache::sIconCache->IconChanged(model->ResolveIfLink()); 142 // PRINT(("preloader updating file %s\n", model->Name())); 143 break; 144 } 145 } 146 break; 147 148 default: 149 _inherited::MessageReceived(message); 150 break; 151 } 152 } 153 154 155 void 156 NodePreloader::PreloadOne(const char *dirPath) 157 { 158 // PRINT(("preloading directory %s\n", dirPath)); 159 BDirectory dir(dirPath); 160 if (!dir.InitCheck() == B_OK) 161 return; 162 163 node_ref nodeRef; 164 dir.GetNodeRef(&nodeRef); 165 166 // have to node monitor the whole directory 167 TTracker::WatchNode(&nodeRef, B_WATCH_DIRECTORY, this); 168 169 dir.Rewind(); 170 for (;;) { 171 entry_ref ref; 172 if (dir.GetNextRef(&ref) != B_OK) 173 break; 174 175 BEntry entry(&ref); 176 if (!entry.IsFile()) 177 // only interrested in files 178 continue; 179 180 Model *model = new Model(&ref, true); 181 if (model->InitCheck() == B_OK && model->IconFrom() == kUnknownSource) { 182 TTracker::WatchNode(model->NodeRef(), B_WATCH_STAT 183 | B_WATCH_ATTR, this); 184 IconCache::sIconCache->Preload(model, kNormalIcon, B_MINI_ICON, true); 185 fModelList.AddItem(model); 186 model->CloseNode(); 187 } else 188 delete model; 189 } 190 191 } 192 193 194 void 195 NodePreloader::Preload() 196 { 197 for (int32 count = 100; count >= 0; count--) { 198 // wait for a little bit before going ahead to reduce disk access contention 199 snooze(100000); 200 if (fQuitRequested) { 201 fLock.Unlock(); 202 return; 203 } 204 } 205 206 BMessenger messenger(kTrackerSignature); 207 if (!messenger.IsValid()) { 208 // put out some message here! 209 return; 210 } 211 212 ASSERT(fLock.IsLocked()); 213 BPath path; 214 if (find_directory(B_BEOS_APPS_DIRECTORY, &path) == B_OK) 215 PreloadOne(path.Path()); 216 if (find_directory(B_BEOS_PREFERENCES_DIRECTORY, &path) == B_OK) 217 PreloadOne(path.Path()); 218 219 fLock.Unlock(); 220 } 221 222